Brief phone call with recruiter - typical screening questions (why HF, why this role, etc.)
Phone call with hiring manager - no structure to the interview, more just a conversation about the role and how my background fits.
On site, 4 interviews - Two interviews were more conversational and made me feel relaxed while the other two felt more like I was being grilled with questions and there was no real conversation to be had. One interviewer was a bit smug as well, so I didn't get a great vibe there. Also, I got asked a lot of product-specific questions that I was surprised about considering this was a project management role, not product management.